Full Idea
When the form of red passes from an object to the eye, the air in between does not become red.
Gist of Idea
When a red object is viewed, the air in between does not become red
Source
Howard Robinson (Perception [1994], 1.2)
Book Reference
Robinson,Howard: 'Perception' [Routledge 2001], p.7
A Reaction
This strikes me as a crucial and basic fact which must be faced by any philosopher offering a theory of perception. I would have thought it instantly eliminated any sort of direct or naïve realism. The quale of red is created by my brain.